[INFO] cloning repository https://github.com/zhenhuanlee/rust_learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zhenhuanlee/rust_learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenhuanlee%2Frust_learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenhuanlee%2Frust_learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f0260ca00cf2a85b25360659997043da257c353b
[INFO] checking zhenhuanlee/rust_learn against 615014f15745532730b9ce7a1d9309f8b4756f93 for pr-160491
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenhuanlee%2Frust_learn" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zhenhuanlee/rust_learn
[INFO] finished tweaking git repo https://github.com/zhenhuanlee/rust_learn
[INFO] tweaked toml for git repo https://github.com/zhenhuanlee/rust_learn written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zhenhuanlee/rust_learn on toolchain 615014f15745532730b9ce7a1d9309f8b4756f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+615014f15745532730b9ce7a1d9309f8b4756f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zhenhuanlee/rust_learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+615014f15745532730b9ce7a1d9309f8b4756f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `soo` (manifest) generated 1 warning
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking zhenhuanlee/rust_learn against 615014f15745532730b9ce7a1d9309f8b4756f93 for pr-160491
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenhuanlee%2Frust_learn" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zhenhuanlee/rust_learn
[INFO] finished tweaking git repo https://github.com/zhenhuanlee/rust_learn
[INFO] tweaked toml for git repo https://github.com/zhenhuanlee/rust_learn written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zhenhuanlee/rust_learn on toolchain 615014f15745532730b9ce7a1d9309f8b4756f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+615014f15745532730b9ce7a1d9309f8b4756f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zhenhuanlee/rust_learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+615014f15745532730b9ce7a1d9309f8b4756f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `soo` (manifest) generated 1 warning
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 3fcbbf2a24d7890747d4eda0ca4d02d38796175a03442b3c85d9391e6b7d7705
[INFO] running `Command { std: "docker" "start" "3fcbbf2a24d7890747d4eda0ca4d02d38796175a03442b3c85d9391e6b7d7705", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fcbbf2a24d7890747d4eda0ca4d02d38796175a03442b3c85d9391e6b7d7705", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3fcbbf2a24d7890747d4eda0ca4d02d38796175a03442b3c85d9391e6b7d7705" "/opt/rustwide/cargo-home/bin/cargo" "+615014f15745532730b9ce7a1d9309f8b4756f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fcbbf2a24d7890747d4eda0ca4d02d38796175a03442b3c85d9391e6b7d7705", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3fcbbf2a24d7890747d4eda0ca4d02d38796175a03442b3c85d9391e6b7d7705" "/opt/rustwide/cargo-home/bin/cargo" "+615014f15745532730b9ce7a1d9309f8b4756f93" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `soo` (manifest) generated 1 warning
[INFO] [stderr]     Checking soo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> src/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let s3 = s1.clone(); // 拷贝
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/main.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let s2 = s1;  // 指针传递，s1 被移除
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s5`
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let s5 = s4;  // 合法，因为是值传递  
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let mut s2 = String::from("world");
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let r1 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r3`
[INFO] [stdout]    --> src/main.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let r3 = &s2;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_r3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r4`
[INFO] [stdout]    --> src/main.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let r4 = &mut &s2;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_r4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |     let mut s = String::from("hello world");
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test1` is never used
[INFO] [stdout]   --> src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn test1 () {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test2` is never used
[INFO] [stdout]   --> src/main.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn test2() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test3` is never used
[INFO] [stdout]   --> src/main.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn test3() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test3_1` is never used
[INFO] [stdout]   --> src/main.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test3_1(sth: String) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test3_2` is never used
[INFO] [stdout]   --> src/main.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn test3_2(si: i32) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test4` is never used
[INFO] [stdout]   --> src/main.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn test4() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test4_1` is never used
[INFO] [stdout]   --> src/main.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn test4_1(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test5` is never used
[INFO] [stdout]   --> src/main.rs:86:4
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn test5() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test5_1` is never used
[INFO] [stdout]   --> src/main.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn test5_1(s: &mut String) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test6` is never used
[INFO] [stdout]   --> src/main.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn test6() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test7` is never used
[INFO] [stdout]    --> src/main.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn test7() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test8` is never used
[INFO] [stdout]    --> src/main.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn test8() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test9` is never used
[INFO] [stdout]    --> src/main.rs:131:4
[INFO] [stdout]     |
[INFO] [stdout] 131 | fn test9() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]    --> src/main.rs:141:8
[INFO] [stdout]     |
[INFO] [stdout] 141 | struct User {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test10` is never used
[INFO] [stdout]    --> src/main.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn test10() {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]    --> src/main.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 | struct Rectangle {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `area`, `can_hold`, and `square` are never used
[INFO] [stdout]    --> src/main.rs:167:8
[INFO] [stdout]     |
[INFO] [stdout] 166 | impl Rectangle {
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 167 |     fn area(&mut self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn can_hold(&self, other: &Rectangle) {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 176 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]    --> src/main.rs:183:6
[INFO] [stdout]     |
[INFO] [stdout] 183 | enum IpAddrKind {
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind2` is never used
[INFO] [stdout]    --> src/main.rs:188:6
[INFO] [stdout]     |
[INFO] [stdout] 188 | enum IpAddrKind2 {
[INFO] [stdout]     |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IpAddr` is never constructed
[INFO] [stdout]    --> src/main.rs:195:8
[INFO] [stdout]     |
[INFO] [stdout] 195 | struct IpAddr {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test11` is never used
[INFO] [stdout]    --> src/main.rs:200:4
[INFO] [stdout]     |
[INFO] [stdout] 200 | fn test11() {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_addr` is never used
[INFO] [stdout]    --> src/main.rs:218:8
[INFO] [stdout]     |
[INFO] [stdout] 217 | impl IpAddrKind2 {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] 218 |     fn print_addr(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dime` are never constructed
[INFO] [stdout]    --> src/main.rs:231:5
[INFO] [stdout]     |
[INFO] [stdout] 230 | enum Coin {
[INFO] [stdout]     |      ---- variants in this enum
[INFO] [stdout] 231 |     Penny,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 232 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 233 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> src/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let s3 = s1.clone(); // 拷贝
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/main.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let s2 = s1;  // 指针传递，s1 被移除
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s5`
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let s5 = s4;  // 合法，因为是值传递  
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let mut s2 = String::from("world");
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let r1 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r3`
[INFO] [stdout]    --> src/main.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let r3 = &s2;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_r3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r4`
[INFO] [stdout]    --> src/main.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let r4 = &mut &s2;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_r4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |     let mut s = String::from("hello world");
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test1` is never used
[INFO] [stdout]   --> src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn test1 () {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test2` is never used
[INFO] [stdout]   --> src/main.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn test2() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test3` is never used
[INFO] [stdout]   --> src/main.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn test3() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test3_1` is never used
[INFO] [stdout]   --> src/main.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test3_1(sth: String) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test3_2` is never used
[INFO] [stdout]   --> src/main.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn test3_2(si: i32) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test4` is never used
[INFO] [stdout]   --> src/main.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn test4() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test4_1` is never used
[INFO] [stdout]   --> src/main.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn test4_1(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test5` is never used
[INFO] [stdout]   --> src/main.rs:86:4
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn test5() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test5_1` is never used
[INFO] [stdout]   --> src/main.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn test5_1(s: &mut String) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test6` is never used
[INFO] [stdout]   --> src/main.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn test6() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test7` is never used
[INFO] [stdout]    --> src/main.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn test7() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test8` is never used
[INFO] [stdout]    --> src/main.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn test8() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test9` is never used
[INFO] [stdout]    --> src/main.rs:131:4
[INFO] [stdout]     |
[INFO] [stdout] 131 | fn test9() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]    --> src/main.rs:141:8
[INFO] [stdout]     |
[INFO] [stdout] 141 | struct User {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test10` is never used
[INFO] [stdout]    --> src/main.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn test10() {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]    --> src/main.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 | struct Rectangle {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `area`, `can_hold`, and `square` are never used
[INFO] [stdout]    --> src/main.rs:167:8
[INFO] [stdout]     |
[INFO] [stdout] 166 | impl Rectangle {
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 167 |     fn area(&mut self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn can_hold(&self, other: &Rectangle) {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 176 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]    --> src/main.rs:183:6
[INFO] [stdout]     |
[INFO] [stdout] 183 | enum IpAddrKind {
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind2` is never used
[INFO] [stdout]    --> src/main.rs:188:6
[INFO] [stdout]     |
[INFO] [stdout] 188 | enum IpAddrKind2 {
[INFO] [stdout]     |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IpAddr` is never constructed
[INFO] [stdout]    --> src/main.rs:195:8
[INFO] [stdout]     |
[INFO] [stdout] 195 | struct IpAddr {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test11` is never used
[INFO] [stdout]    --> src/main.rs:200:4
[INFO] [stdout]     |
[INFO] [stdout] 200 | fn test11() {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_addr` is never used
[INFO] [stdout]    --> src/main.rs:218:8
[INFO] [stdout]     |
[INFO] [stdout] 217 | impl IpAddrKind2 {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] 218 |     fn print_addr(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dime` are never constructed
[INFO] [stdout]    --> src/main.rs:231:5
[INFO] [stdout]     |
[INFO] [stdout] 230 | enum Coin {
[INFO] [stdout]     |      ---- variants in this enum
[INFO] [stdout] 231 |     Penny,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 232 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 233 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "3fcbbf2a24d7890747d4eda0ca4d02d38796175a03442b3c85d9391e6b7d7705", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fcbbf2a24d7890747d4eda0ca4d02d38796175a03442b3c85d9391e6b7d7705", kill_on_drop: false }`
[INFO] [stdout] 3fcbbf2a24d7890747d4eda0ca4d02d38796175a03442b3c85d9391e6b7d7705
